1. Division of Neurosurgery and Spine Program, Krembil Neuroscience Centre, Toronto Western Hospital, University Health Network, Toronto, ON, Canada
2. Division of Neurosurgery and Spine Program, Department of Surgery, University of Toronto, Toronto, ON, Canada
3. Institute of Medical Science, University of Toronto, Toronto, ON, Canada
4. Department of Neurological and Orthopedic Surgery, Division of Spine and Peripheral Nerve Surgery, Delaware Valley SCI Center, Thomas Jefferson University, Philadelphia, PA, USA
5. Neurological Surgery and the Miami Project to Cure Paralysis, Miller School of Medicine, University of Miami, Miami, FL, USA
6. Department of Orthopaedics, International Collaboration on Repair Discoveries, University of British Columbia, Vancouver, BC, Canada